KR20030074966A - Process For Sludge Treatment Using Sludge Pretreatment And Membrane Bioreactor - Google Patents

Process For Sludge Treatment Using Sludge Pretreatment And Membrane Bioreactor Download PDF

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Publication number
KR20030074966A
KR20030074966A KR1020020013992A KR20020013992A KR20030074966A KR 20030074966 A KR20030074966 A KR 20030074966A KR 1020020013992 A KR1020020013992 A KR 1020020013992A KR 20020013992 A KR20020013992 A KR 20020013992A KR 20030074966 A KR20030074966 A KR 20030074966A
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South Korea
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sludge
treatment
bioreactor
pretreatment
membrane separation
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KR1020020013992A
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Korean (ko)
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염익태
김형수
권재현
김훈
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주식회사 태영
주식회사 제닉스엔지니어링
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Priority to KR1020020013992A priority Critical patent/KR20030074966A/en
Priority to US10/389,407 priority patent/US20030178364A1/en
Priority to EP20030251563 priority patent/EP1346956A1/en
Priority to PCT/KR2003/000498 priority patent/WO2003078335A1/en
Priority to AU2003212695A priority patent/AU2003212695A1/en
Priority to CN03119345A priority patent/CN1445182A/en
Priority to JP2003071944A priority patent/JP2003275796A/en
Publication of KR20030074966A publication Critical patent/KR20030074966A/en

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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/1236—Particular type of activated sludge installations
    • C02F3/1268—Membrane bioreactor systems
    • C02F3/1273—Submerged membrane bioreactors
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/02—Biological treatment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C02F1/025—Thermal hydrolysis
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/06—Sludge reduction, e.g. by lysis
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/20—Sludge processing

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  • Life Sciences & Earth Sciences (AREA)
  • Water Supply & Treatment (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Molecular Biology (AREA)
  • Health & Medical Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Treatment Of Sludge (AREA)
  • Activated Sludge Processes (AREA)

Abstract

PURPOSE: Provided is a sludge treatment method comprising a sludge pretreatment step for increasing solubility and biodegradability using chemicals, and a primary treatment step using a membrane bioreactor, thereby reducing treatment time and increasing treatment efficiency. CONSTITUTION: The method comprises the steps of inputting alkali chemicals into a sludge tank(11), ozone treating the sludge being outflowed from the sludge tank in an ozone treating tank(12), transferring the ozone treated sludge to a pretreatment sludge tank(13), and treating the pretreated sludge in a bioreactor(21) having a membrane separator(22) therein.

Description

슬러지 전처리 및 고농도 막분리 생물반응조를 이용한 슬러지 처리방법 {Process For Sludge Treatment Using Sludge Pretreatment And Membrane Bioreactor}Sludge Pretreatment and Sludge Treatment Using Sludge Pretreatment And Membrane Bioreactor

본 발명은 슬러지 전처리 및 고농도 막분리 생물반응조를 이용한 슬러지 처리방법에 관한 것으로, 보다 더 상세하게는 생물학적 하폐수 처리공정에서 발생된 잉여슬러지를 화학적 전처리로 가용성 및 생분해성을 촉진, 증가시킨 후, 고농도 막분리 처리로 처리시간 및 효율을 획기적으로 개선시킨 것이다.The present invention relates to a sludge treatment method using a sludge pretreatment and a high concentration membrane separation bioreactor, and more specifically, to increase and increase the solubility and biodegradability by chemical pretreatment in the excess sludge generated in the biological sewage treatment process, Membrane separation treatment significantly improved the processing time and efficiency.

통상, 오수, 하수 및 폐수의 처리방법으로 채택되고 있는 활성슬러지 공법 또는 그 변형공법 등은 미생물에 의한 유기물을 처리하는 공법으로서, 유기물 분해에 따른 미생물 성장의 결과로서 미생물 농도가 증가하게 된다.Generally, activated sludge method or modified method thereof, which is adopted as a treatment method of sewage, sewage and waste water, is a method of treating organic matter by microorganisms, and the concentration of microorganisms increases as a result of microbial growth due to decomposition of organic matter.

이와 같은 공법의 안정적 운전과 고액분리를 위해서는 상기 발생된 슬러지중 적절한 수준의 슬러지를 인발하여 주는 것이 필수적으로 요구된다.For stable operation and solid-liquid separation of this method, it is essential to draw an appropriate level of sludge out of the generated sludge.

이상의 요구 조건에 따라 인발된 잉여슬러지는 농축, 탈수 등의 물리적 감량공정 및 생물학적 감량공정을 거쳐서 최종 케이크 형태로 배출되어 매립, 소각 또는 해양투기 등의 방법으로 최종처리 된다.The excess sludge drawn according to the above requirements is discharged in the form of a final cake through physical reduction processes such as concentration and dehydration and biological reduction processes, and finally processed by landfilling, incineration or ocean dumping.

종래의 상기 슬러지에 대한 대표적인 감량공법은 혐기소화공법과 호기소화공법을 들 수 있는데, 이 두 공법은 기본적으로 별도의 유기물을 공급하지 않고, 생물반응조를 운전함으로써 슬러지를 구성하고 있는 미생물의 자산(자체산화) 또는 자체분해를 유도하는 방식을 사용하고 있다.Representative reduction methods for the conventional sludge include anaerobic digestion and aerobic digestion, and these two methods basically do not supply separate organic matter, and operate the bioreactor to control the assets of microorganisms constituting the sludge ( Self-oxidation) or self-degradation.

상기 혐기소화공법은 공기의 공급없이 온도, pH 등의 조절만을 수행하며, 슬러지 자체산화를 유도하는 방식으로, 상대적으로 분해시간이 길어 보통 30일 이상의 체류시간으로 20~30%의 슬러지 감량효과를 얻을 수 있다.The anaerobic digestion method only controls temperature, pH, and the like without supplying air, and induces sludge self-oxidation, so that the decomposition time is relatively long, and thus a sludge reduction effect of 20 to 30% is usually achieved with a residence time of 30 days or more. You can get it.

상기 호기소화공법은 슬러지를 폭기하여 호기적인 상태에서 슬러지 자체산화와 혼합을 동시에 수행(도 1참조)한 바, 상기 혐기소화공법에 비하여 처리소요 시간을 15~20일로 단축 할 수 있는 장점이 있으나, 폭기에 필요한 추가 비용이 소요되는 단점이 있다.The aerobic digestion method has the advantage of reducing the time required for treatment to 15 to 20 days compared to the anaerobic digestion method by performing sludge self-oxidation and mixing simultaneously in the aerobic state by aeration of the sludge. However, there is a disadvantage in that an additional cost required for aeration is required.

이상과 같이, 혐기 및 호기소화공법의 처리시간이 길고, 감량효율도 20~40%수준으로 낮은 근본적인 이유는 슬러지를 구성하고 있는 미생물의 생분해성이 낮기 때문이라 할 수 있다.As mentioned above, the basic reason is that the processing time of the anaerobic and aerobic digestion methods is long, and the weight loss efficiency is low at the level of 20 to 40%. This is because the biodegradability of the microorganisms constituting the sludge is low.

즉 슬러지의 생분해는 미생물의 가수분해단계를 통한 가용화와 가용화된 유기물의 섭취 및 분해의 두 단계로 나눌 수 있는데, 슬러지의 전체 분해속도를 제한하고 있는 단계는 바로 첫번째 단계인 가용화 단계로 알려져 있고, 미생물의 가용화가 더딘 이유는 세포 구성물질을 둘러싸고 있는 단단한 세포막이 세포구성물질들의 가수분해를 억제하는 역할을 하기 때문인 것으로 알려져 있다.That is, biodegradation of sludge can be divided into two stages: solubilization through hydrolysis step of microorganism and ingestion and decomposition of solubilized organic matter. The limiting rate of total sludge decomposition is known as the solubilization step. The slow solubilization of microorganisms is known to be due to the fact that the rigid cell membranes surrounding the cellular components play a role in inhibiting the hydrolysis of the cellular components.

또한, 이상과 같은 슬러지 처리방법은 그 처리비용이 수처리 비용과 대등하게 소요되어 유지관리 비용에서 큰 부분을 차지하며, 또한 처리 및 수송과정에서 악취등 위생상 문제로 민원발생 주요인이 되고 있다.In addition, the sludge treatment method as described above takes up a large part of the maintenance cost because the treatment cost is equivalent to the water treatment cost, and also has become a major cause of complaints due to hygiene problems such as odor during treatment and transportation.

본 발명은 이상과 같은 문제점을 해결하기 위하여 안출된 것으로서, 본 발명의 목적은 슬러지의 생분해 소멸을 촉진하기 위하여, 호기적 방법으로 슬러지의 분해를 유도하되, 호기적 생물반응조에 두가지 기능의 공법을 결합한 바, 첫째는 슬러지를 오존 또는 알칼리 등 화학적으로 전처리하여 슬러지를 구성하는 미생물의 세포막을 파괴시켜 세포구성물질들의 가용화를 촉진시키고, 이를 생물 반응조에 공급하여 줌으로써 슬러지의 생분해도를 획기적으로 높일 수 있으며, 둘째는 생물반응조내에 중공사형 또는 평막형 분리막을 침지시켜 고액분리를 수행함으로, 미생물 농도가 극대화되어 상기 전처리 가용화된 슬러지가 신속하게 자체산화 및 분해, 소멸되는 생물반응조를 이용한 슬러지 처리공법을 제공함에 있다.The present invention has been made to solve the above problems, the object of the present invention is to induce the decomposition of sludge in an aerobic method, in order to promote the biodegradation and extinction of the sludge, the two-function method in the aerobic bioreactor Combined, first, chemical pretreatment of sludge, such as ozone or alkali, destroys the cell membranes of the microorganisms that make up the sludge, thereby promoting solubilization of cell components and supplying them to the bioreactor to dramatically increase the biodegradability of the sludge. Second, by performing the solid-liquid separation by immersing the hollow fiber or flat membrane membrane in the bioreactor, the concentration of microorganisms is maximized, the sludge treatment method using a bioreactor to rapidly oxidize, decompose, and extinguish the pretreated solubilized sludge. In providing.

이와 같은 목적을 달성하기 위하여, 본 발명은 잉여슬러지를 처리함에 있어, 슬러지를 화학적으로 가용성 및 생분해성을 촉진시키는 전처리를 한 후, 폭기상태에서 고액분리를 수행하는 공정으로 이루어져 있다.In order to achieve the above object, the present invention, in the treatment of excess sludge, after the pretreatment to promote the chemical solubility and biodegradation of the sludge, consists of a process for performing solid-liquid separation in aeration.

도 1은 종래의 호기소화를 이용한 슬러지 처리방법을 나타낸 개략적인 도면1 is a schematic view showing a sludge treatment method using a conventional aerobic digestion

도 2는 종래의 막분리형 생물반응조 처리방법을 나타낸 개략적인 도면Figure 2 is a schematic diagram showing a conventional membrane separation bioreactor treatment method

도 3은 본 발명에 의한 슬러지 처리방법을 나타낸 개략적인 도면3 is a schematic view showing a sludge treatment method according to the present invention.

도 4는 본 발명과 종래의 호기소화를 이용한 슬러지 처리방법에 대한 슬러지 감량 대비표4 is a sludge reduction comparison table for the sludge treatment method using the present invention and conventional aerobic digestion

※ 도면의 주요 부분에 대한 부호의 설명※ Explanation of codes for main parts of drawing

10 : 전처리장치 11 : 슬러지저류조10: pretreatment device 11: sludge storage tank

12 : 오존처리조 13 : 전처리슬러지저류조12: ozone treatment tank 13: pretreatment sludge storage tank

14 : 폭기장치14 aeration device

20 : 막분리형 분해반응장치 21 : 생물반응조20: membrane separation decomposition reaction apparatus 21: bioreactor

22 : 막분리 고액분리장치 30 : 반송라인22: membrane separation solid-liquid separation device 30: conveying line

이하, 본 발명을 첨부된 도면에 의하여 상세히 설명하기로 한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

도 3은 본 발명에 의한 잉여슬러지 처리공정을 나타낸 개략적인 도면으로서, 도시된 바와 같이, 슬러지의 전처리장치(10)와 막분리형 분해반응장치(20)로 이루어져 있는 것으로, 구체적으로 상세히 설명하면 다음과 같다.FIG. 3 is a schematic view showing the excess sludge treatment process according to the present invention. As shown, the sludge pretreatment apparatus 10 and the membrane separation type decomposition apparatus 20 will be described in detail. Same as

슬러지 전처리장치(10)Sludge Pretreatment Device (10)

잉여슬러지는 대부분 미생물의 군집으로 이들 미생물은 세포벽 구조를 가지고 있는 바, 화학적 또는 물리적으로 상기 세포벽을 파괴하여야 미생물이 가용화되고, 고분자 물질들이 저분자 물질로 전환되며, 상기 슬러지의 생분해성이 촉진, 증가된다.Surplus sludge is a community of most microorganisms, and these microorganisms have a cell wall structure. The microorganisms are solubilized by chemically or physically destroying the cell walls, polymer materials are converted into low molecular materials, and the biodegradability of the sludge is promoted and increased. do.

상기 미생물 세포벽 파괴를 위한 전처리장치(10)의 기술로는 알칼리처리, 오존처리, 열적처리 등이 있으며, 이를 선택적으로, 또는 상기 처리중 선택적 병합처리로 이루어진다.Techniques of the pretreatment device 10 for destroying the microbial cell wall include alkali treatment, ozone treatment, thermal treatment, etc., which may be selectively or selectively combined during the treatment.

상기 도 3의 일 실시예로서, 전처리장치(10)는 슬러지저류조(11)에서 알칼리주입처리공정, 오존처리조(12)에서 오존처리공정, 전처리슬러지저류조(13)로 이루어지는 것으로, 슬러지의 가용화 및 생분해도 촉진 효과는 표 1과 같다.As shown in FIG. 3, the pretreatment apparatus 10 includes an alkali injection treatment process in the sludge storage tank 11, an ozone treatment process in the ozone treatment tank 12, and a pretreatment sludge storage tank 13 to solubilize the sludge. And biodegradation promoting effect is shown in Table 1.

이때, 슬러지의 초기 부유물 농도와 COD(cr)농도는 각각 11,440mg/L 와 13,890mg/L이며, 생분해도 실험은 호흡법(Respirometry)을 이용하여 측정한 것이다.At this time, the sludge initial suspended solids concentration and the COD (cr) concentration were 11,440mg / L and 13,890mg / L, respectively, and the biodegradability experiment was measured by respirometry.

막분리형 분해반응장치(20)Membrane Separation Decomposition Apparatus (20)

막분리형 분해반응장치(20)는 생물반응조(21)에서의 유기물 분해공정과 막분리 고액분리장치(22)의 고액분리공정으로 이루어져 있는 것으로, 상기 막분리 고액분리장치(22)의 고액분리공정은 중공사형 또는 평막형 모듈을 상기 생물반응조(21)에 침지시켜 음압을 걸어 고형물은 걸러주고, 처리액은 하수처리공정으로 반송하여 처리토록 한다.The membrane separation decomposition reaction apparatus 20 is composed of the organic matter decomposition process in the bioreactor 21 and the solid-liquid separation process of the membrane separation solid-liquid separator 22, and the solid-liquid separation process of the membrane separation solid-liquid separator 22. The silver hollow fiber type or flat membrane type module is immersed in the bioreactor 21 to apply a negative pressure to filter the solids, and the treated liquid is returned to the sewage treatment process for treatment.

상기 생물반응조(21)내 슬러지 고형물 농도 증가는 두가지 방식으로 처리 감량효율이 높아지는 바, 그 첫째는 슬러지의 자산 또는 내생호흡속도가 슬러지의 농도에 선형적으로 비례하기 때문에 자산분해속도가 증가 하게 되고, 둘째는 전처리 과정을 거쳐 분해가능한 물질로 전환된 슬러지 분해속도가 높아지기 때문이다.The increase in sludge solids concentration in the bioreactor 21 increases treatment loss efficiency in two ways. First, the rate of decomposition of assets increases because the sludge asset or endogenous respiration rate is linearly proportional to the concentration of sludge. Second, the sludge decomposition rate is increased due to the pretreatment process.

한편, 상기 전처리된 슬러지는 생물반응조(21)에서 호기적으로 분해되지만 분해과정에서 새로운 미생물이 형성되므로 생물반응조의 미생물 농도를 적절히 조절할 필요가 있어 슬러지의 일부를 인발하여 슬러지 저류조(11)로 반송라인(30)을 통하여 반송한다.On the other hand, the pretreated sludge decomposes aerobically in the bioreactor 21, but since new microorganisms are formed in the decomposition process, it is necessary to appropriately control the concentration of microorganisms in the bioreactor, drawing part of the sludge and returning it to the sludge storage tank 11. It conveys via the line 30.

또한, 슬러지중 유기물은 완전 감량 할 수 있으나 비분해성 무기물질이 농축될 수도 있는바, 이를 방지하기 위해서 일정량의 슬러지를 인발(20% 이하)하여 야 한다.In addition, the organic matter in the sludge can be completely reduced, but non-degradable inorganic substances may be concentrated. In order to prevent this, a certain amount of sludge should be drawn (20% or less).

도 1의 종래 호기소화처리방법과 도 3의 본 발명의 처리방법으로 처리하여 슬러지 감량효율을 비교 실험한 결과를 도 4와 같이 나타 내었다.The result of comparing the sludge reduction efficiency by the conventional aerobic digestion treatment method of FIG. 1 and the treatment method of the present invention of FIG. 3 is shown as FIG. 4.

상기 처리방법은 동일한 운전조건으로 하였으며, 수리학적 체류시간은 5일로하였던 바, 도 1의 종래 호기소화처리방법의 경우, 슬러지의 분해속도가 낮아 슬러지 농도가 급격히 올라가기 때문에 처리시간을 늘리거나 다량의 슬러지를 인발하여 주어야 생물반응조내 농도를 유지시킬 수 있는데 비하여, 도 3의 본 발명 처리방법의 경우는 슬러지의 분해속도가 높아 생물반응조내 슬러지 농도가 일정수준에 도달하면 더 이상 증가되지 않아 상기 무기물질의 축적을 방지하기 위한 최소한의 슬러지 인발만으로도 일정한 슬러지 농도를 유지 시킬 수 있다.The treatment method was performed under the same operating conditions, and the hydraulic retention time was 5 days. In the conventional aerobic digestion method of FIG. 1, the sludge concentration is rapidly increased due to the low decomposition rate of the sludge, thus increasing the treatment time or increasing the amount. When the sludge is drawn to maintain the concentration in the bioreactor, the treatment method of the present invention of FIG. 3 does not increase any more when the sludge concentration in the bioreactor reaches a high level due to the high decomposition rate of the sludge. It is possible to maintain a constant sludge concentration with minimal sludge drawing to prevent the accumulation of inorganic substances.

상기 생물반응조내 유기고형물의 농도가 높아지게 되면 막분리 고액분리장치 (22)의 분리막의 폐색이 촉진되기 때문에 상기 분리막 하단부에 폭기관을 정렬시켜 공기방울에 의해 형성된 상향류를 통하여 폐색을 방지하도록 한다.When the concentration of organic solids in the bioreactor is increased, the blockage of the membrane of the membrane separation solid-liquid separator 22 is promoted, thereby aligning the width pipe at the lower end of the membrane to prevent the blockage through an upward flow formed by air bubbles. .

상기 생물반응조에서 유기물과 함께 질소성분을 동시에 제거하기 위해서는 간헐 폭기하거나, 생물반응조 전단에 별도의 무산소조를 설치하여 내부 순환시켜 운전할 수 있다.In order to simultaneously remove the nitrogen component together with the organic material in the bioreactor, it may be operated by intermittently aeration or by installing a separate anoxic tank in front of the bioreactor.

이상 설명한 바와 같이, 본 발명은 하폐수를 처리하는 과정에서 발생된 잉여슬러지를 처리하는 것으로, 상기 슬러지 감량처리의 소요시간은 대폭 줄이며, 처리효율은 상승시켜 슬러지 케이크의 발생량을 획기적으로 저감시킬 수 있는 효과가 있고, 이에 따른 경비 절감 및 민원 발생요인이 해결된 효과가 있다.As described above, the present invention is to process the excess sludge generated in the process of treating the waste water, the time required for the sludge reduction treatment is greatly reduced, the treatment efficiency is increased to significantly reduce the amount of sludge cake generated It is effective, resulting in cost reduction and complaints.

Claims (4)

하폐수의 생물학적 처리과정에서 발생된 잉여슬러지를 감량처리하는 방법에 있어서, 슬러지저류조(11)에서 알칼리주입처리공정, 오존처리조(12)에서 오존처리공정, 전처리슬러지저류조(13)로 이루어진 전처리장치(10)와, 생물반응조(21)내에 막분리고액분리장치(22)가 설치된 막분리형 분해반응장치(20)로 이루어져 있는 것을 특징으로 하는 슬러지 전처리 및 고농도 막분리 생물반응조를 이용한 슬러지 처리방법.In the method for reducing the excess sludge generated during the biological treatment of sewage water, pretreatment apparatus consisting of an alkali injection treatment process in the sludge storage tank 11, an ozone treatment process in the ozone treatment tank 12, and a pretreatment sludge storage tank 13 Sludge pretreatment and sludge treatment method using a high concentration membrane separation bioreactor, characterized in that consisting of a membrane separation type decomposition reaction device (20) having a membrane separation solid-liquid separator (22) in the bioreactor (21). 제 1항에 있어서, 생물반응조(21)에서 슬러지의 일정량을 인발, 반송라인 (30)을 통하여 슬러지저류조(11)로 보내어져 유입슬러지와 함께 다시 전처리공정을 거치도록 되어 생물반응조내 고형물 농도를 조절하는 것을 특징으로 하는 슬러지 전처리 및 막분리 생물반응조를 이용한 슬러지 처리방법.The method according to claim 1, wherein a predetermined amount of sludge is drawn from the bioreactor 21 to the sludge reservoir tank 11 through the conveying line 30 to be subjected to a pretreatment process again with the inflow sludge to increase the solids concentration in the bioreactor. Sludge treatment using sludge pretreatment and membrane separation bioreactor, characterized in that for adjusting. 제 1항에 있어서, 슬러지중 질소성분을 제거하기 위해 상기 생물반응조(21)에서 간헐적으로 폭기하거나 또는 별도 무산소조를 설치, 내부 순환시켜 호기상태와 무산소상태를 번갈아 제공하는 것을 특징으로 하는 슬러지 질소성분의 질산화 및 탈질을 촉진시키는 처리방법.The sludge nitrogen component according to claim 1, wherein the bioreactor 21 aeration is intermittently aerated or a separate anoxic tank is installed and internally circulated to alternately provide an aerobic and anoxic state in order to remove nitrogen components from the sludge. Treatment to promote nitrification and denitrification 제 1항에 있어서, 상기 전처리장치(10)는 알칼리처리 또는 오존처리에 열적처리 또는 기계적처리를 선택적 병합처리로 이루어지는 것을 특징으로 하는 슬러지 전처리 및 막분리 생물반응조를 이용한 슬러지 처리방법.The sludge treatment method using sludge pretreatment and membrane separation bioreactor according to claim 1, wherein the pretreatment device (10) comprises a selective treatment of thermal treatment or mechanical treatment to alkali treatment or ozone treatment.
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